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Finding the Fourth Proportional to 3,431.12, 5,148.12 and 1,483.76

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Solution

The fourth proportional to 3,431.12, 5,148.12 and 1,483.76 is: 2,226.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.12 : 5,148.12 = 1,483.76 : x
  2. Step 2: Convert to fraction form
    3,431.12/5,148.12 = 1,483.76/x
  3. Step 3: Cross multiply
    3,431.12x = 5,148.12 × 1,483.76
  4. Step 4: Simplify right side
    3,431.12x = 7,638,574.53
  5. Step 5: Solve for x
    x = 7,638,574.53/3,431.12
  6. Step 6: Final answer
    x = 2,226.26

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Double scale
Find fourth proportional to 3,432.12, 5,149.62 and 1,484.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.